For a 3-um-diameter optical fiber with core and cladding indexes of re – McqOptions

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1.	For a 3-um-diameter optical fiber with core and cladding indexes of refraction of 1.545 and 1.510, respectively. The cut off wavelength is.
A.	2.3 um
B.	1.29 um
C.	1.5 um
D.	3.24 um
Answer» C. 1.5 um

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